
\begin{tikzpicture}[scale=2]
  \coordinate (O) at (0,0);
  \coordinate[label=above:$A$] (A) at (0,2);
  \coordinate[label=below:$C$] (C) at (0,-1);
  \coordinate[label=right:$B$] (B) at (5/4,0);
  \coordinate[label=left:$D$] (D) at (-3/4,0);
  \coordinate[label=left:$B'$] (B') at (5/4,3);
  \pic[mark angle={teal}{3mm}{1}] {right angle=B--O--A};
  \pic[mark angle={teal}{3mm}{1}] {right angle=B'--B--D};
  \draw (A) -- (B) -- (C) -- (D) -- cycle
    (A) -- (C) (B) -- (D);
  \draw[dashed] (B) -- (B');
  \draw[red] (A) -- (D);
  \draw[blue] (B) -- (C);
  \draw[blue, dashed] (B') -- (A);
  \draw[teal, dashed] (B') -- (D);
  \fill[opafill=cyan] (B') -- (B) -- (D) -- cycle;
\end{tikzpicture}
